Math Problem Statement

Find x, if A(x, 5), B(-3, 1), and length of AB = 5.

Solution

The problem asks us to find the value of xx, given the points A(x,5)A(x, 5) and B(3,1)B(-3, 1), with the length of AB=5AB = 5.

Solution:

The formula for the distance between two points is: AB=(x2x1)2+(y2y1)2AB = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} Substitute the points A(x,5)A(x, 5) and B(3,1)B(-3, 1) into the formula: 5=((3)x)2+(15)25 = \sqrt{((-3) - x)^2 + (1 - 5)^2}

Simplify: 5=(x+3)2+(4)25 = \sqrt{(x + 3)^2 + (-4)^2} 5=(x+3)2+165 = \sqrt{(x + 3)^2 + 16}

Square both sides to eliminate the square root: 25=(x+3)2+1625 = (x + 3)^2 + 16

Simplify: 2516=(x+3)225 - 16 = (x + 3)^2 9=(x+3)29 = (x + 3)^2

Take the square root of both sides: x+3=±3x + 3 = \pm 3

Solve for xx:

  1. x+3=3x + 3 = 3x=0x = 0
  2. x+3=3x + 3 = -3x=6x = -6

Final Answer:

The possible values of xx are: x=0orx=6x = 0 \quad \text{or} \quad x = -6

Would you like further details or have any additional questions?


5 Related Questions:

  1. What is the formula for the midpoint of two points?
  2. How does squaring both sides of an equation affect the solution?
  3. Can there be multiple solutions to a distance equation? Why?
  4. How would the solution change if the length of ABAB were different?
  5. How can this problem be represented graphically?

Tip:

Always verify your solutions by substituting back into the original equation to ensure they satisfy the given conditions.

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Math Problem Analysis

Mathematical Concepts

Distance Formula
Algebra
Equations

Formulas

Distance formula: AB = √((x2 - x1)^2 + (y2 - y1)^2)

Theorems

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Suitable Grade Level

Grades 9-10